Scraper



L. O. BIRD Aug. 18, 1936.

SCRAPER Filed Dec. 13, 1932 I5 Sheets-Sheet 1 Aug.1s,1936. LOIBIRD 2,051,197

S CRAP ER Filed Dec: 15, 1952 s sheets-sheet 2 Aug. 18, 1936.

L. o. BIRD SGRAPER Filed Dec. 1 3, 1932 's sheets-sheet s Patented Aug. 18, 1936 UNITED STATES SCRAPERv Len o. Bird, Glendalegoaliemssisnurto 'W. L. Adams, Rexbuljg, Idaho v 4Applicztlition .December 13;l932,;-Se1-ial :46,942 I lololaims. (Clica-.14m A 4invention .relates to scrapers .of .both .the wdrag :and wheel types, i and 1 has 'for aan object the .provision of ascraper,ofgreatlysimplied design. Whereas fin the average scraper, numerous .f5 bracing members must v be provided, with the present :scraper 1I have. so :coordinated the scraper actuating members .and `carriage that ,-Alwobble, twist, .or other distortion, which ordi- ;narilyroccurs .infscrapers .with .whichztheinventor familiar,is;completely overcome.

atnother object `is the Tprovision of a .scraper isfeasytooperate, positively controlledpand in which ,the scraper and its bowlmeniber may :tilted backwardly or forwardly at the `option @of the zoperator.

Another @object consists in simplifying vthe structure -adapted.to:,in1:ei'c onn ect ythe I frame with zthccraper.

.#Another :object consist-s inthe provision of a .20 fseraperof :the characteristated in which the in- `-eclinationgiventhe scraper-blade is directly :controllen by :the operator.

,Another :Object is1the provision of a scraper havingiassociatedcontrol Vmechanism which does .Q5 :not reduire ,adjustment .to adapt the -scraper -to Naryingfsoil conditions requiring diierent v,depths vnl' cut.

. Other objects ,include j a scraper whichis sim- ,ple fof construction, positive in operation, .inex- 'gg ,pensive in'cost of manufacture, 'capable of use l`over :a ,long .duration of vtime iWthout any urnechanical attention, and which is generallysupe- Z:rior toscrapers nowknown to theinventor.

`-With the abovementioned and other objects :in Niew, the invention consists inthe `novel and -useful provision, formation, construction, association and `nterrelationof parts, members and :features ,=a1l as `.shown .ina certain embodiment in the accompanying drawings, described gener- .40,a1iy and more particularly pointed out inthe In the Adrawings: K f Figure ,1 ,isa fragmentary side elevation l of ,the imDrovedscraper-shown associated with a trac- .,tor,

Figure2 isa fragmentary side elevationshow- ,ing the scraper in achanged position from that of vFigure 1, 4 Y

Figure 3 is a fragmentaryside elevation-showking the scraper revolved `substantially 90 Afrom the showing. of AFigure 1, said scraper being shown induxnping andleveling position.

' Figure l4 s,a;fragmentary plan view, partlyin section, of .the .improved scraper, Figure r 5 Yis ,an enlarged fragmentary side `ele- `tration, .partly insection, of certain mechanism fof @the scraper, Y

'Eigurefi is-.azfragmenta-ry elevation of a drag fscrapersincorporating--the invention,

V:ligure :7 .is ,;a @View .similar vto Figure 6, .the 5 scraper being Vin digging position,

i. Figure 2 8 .ris .-a view-similar to Figure .6, the .scraper being .in leveling or dumping position,

tand, Y

Figureisfa plan .view ofthe scraper shown in 10 Figures 6, .J7 and s mounted on wheels. 'Referring toztheedrawings, l'have designated ithe :scraper fas an entirety by the .numeral l, .and thesameincludes afbowl 2 having a pair of spaced side :membersi ;and,.4, a -base portion 5, 1-5 :and l:aaback ,Wallf extendinglbetween the sides :and it. .suitable A.construction Afor main- :ta-ini-ng the :elements of :the =bow1 in `position of .assemblage =ma.y:be;uti'1ize d, and in the present nstanceglfhave,utilizedcurved angle irons 1 for 20 ,circularfso @far as ,the .curvature .of the back is concerned totheend that the1bow1 is in reality 30 ieccentric tofthe wheels, as :best yillustrated in :Figure 1. The.forwardportionof the bowl, par- ',ticularly that lportion not l included .Within the `connesofthe Xback .is provided vwith a pair of f segmentalvshaes ,l2 and 1 3. These shoes v.are van- 35 gularfin formation Aand one lshoe is secured to one 'sideineachzinstance When the bowl is inthe dmsition shown iniigure 1 either by full lines` or 'dotted 1ines,:the.shoes yare spaced voutwardly re1- fative to-.the periphery of the wheels. 40

'The trunnionsiandaare `secured to thezsides of thebowl-infthefollowing manner, one trunnion :being .describedras bothf are identical in construc- .;tio n. ,.Aiflange;lisboltedforotherwise secured, as vshown at-Itoaside. `Spacedfrom the fiange I4 y 45 and concentric relative to the trunnion is aange -16 ,having a circular periphery, vand webbing I1 .is interposedbetweenzthe flanges I4 and I6. This flange forms a portion of ,a bearing, the other partein @the bearing including .a Ysubstantially 50 v li-shaped, angled iiange i8 secured toa, side beam I9 by suitable means, such as shown at 20. The flange,II5,isadapted-to be-interposed between the side beam andtheangled member .|8. This construction gives alarger Abevearing l area and is par- 55 Y secured to the bearing memberY 8 being of greater transverse dimension. ,The .portion` 22, being the lowermost part of the forwardfportion of each side beam is pivotallyfsecured bymeans2| between end furcations of Vmembers' 24 and 25.

These members V2li and 25 vare elements of a draft framing, designated generally as 26. This draft framing includes a cross-piece 21 extendingbe-` .tweenY the elements 24 and 25,' and' tiars and j 29 in angular formation, Vthere being a. tongueV 3G centrally secured to the fcrosspiece21 and'to Y by theY cross piece 21.

shaft 32.

what may be termed the apex of the bars 28 Vand 29. The members 24 and 25 depend at-an`angle `,relative to the cross piece andare bolted or otherwise secured to said cross piece and thesaid, bars 28 and 29; `Both members24 and25lare'provided with bearing members: 3| andextending transversely between .saidbearing members is a at cerainzones between .the bearing members 3| bymeans of bearing flanges341=and.35icarried The shaft 32 extends throughV theV elements 24 and 251andfsecured to the outermost extremity of-'said shaft arerlevers v'36 VVand31. Azlink 38 is Vsecured'tothe. extremityY ofthe lever Y36and toV the vside-fbeam2| adjacent vthe'V upper edge thereof, as .shownf at 39.' V,The

opposite lever 31V has :secureditheretoza link 40 lwhichlinturn is secured "to the' top edge of the beam |.9,`. as vshown-best inFgurel," at 4|. zThe shaft' 32has securedtheretoa-:lever 42, termed "the loading lever, and surroundingthe 'shaftY 32 isa coil'spring 43, one enrirof .Whicmisscuredjto .the said shaftand :the opposite end @which n;

gages the cross'piece21, totheend that the shaftY 32 isnormally rotated in one' direction lwhen pull fisimposed upon' the-lever 42.

The'upper andputermost end portionsV of .the

, beams |9 and V2|:are providedlwithxextensions Lisa, .both formed with bearingsadaptedita re ceive endl-portions lof'V ha' shaft: 33. The vshaft. Y3,3

-car'ries ladj acent ends'- thereof v levers44 andf45. f

There isV a'linkifor each lever'.pivotallysecured .'the'reto, as shown at 46.7andf41gand-each linkin turnis pivotally Ysecuredtoan'erid cfa bell crank lever.V Two bellcrank levers .are'sho'wn at 48 Vand -i49. Both bellcranksV are bifurcated. in form, with ends ofrvsaid linksbeingf'received between saidV bifurcations and pinned therebetween. The'opvposite ends `of, the bell cranks are swinglngly K V'secured' to the'outermost surface of the side beamsVV |9 and Y2|, as illustrated for 'the side I9 at 50. At the angular portion and spanning the j Vbifurcation of each rbellc'rank lever isa pin 5|.

Bothisides'of said bowl'carrya.1pluralit'y of Y 'Y 'Y stops 52, 53 and 54, stops having like numerals iro forboth sides-being in alignment, andv these stops are Y.adapted to' cooperate with'Y the bell fcrank levers. 'A "i Y H. The b'o'wlc'arries the usual blade'55trans`yersely extending between the sides4 andse'cured'Y t'o the iThe-foperationyuses Vand advantages'of the infvention: just described as vshown in -1 to 5,

some" machinesu/ehas the tractorY shown at 56. A pull cord' 51 is secured tothe'lever 42l andexthe position'shown in saidY figure.

This shaft is braced against distortion `stopsca'rriedVA by sides ofthe bowl.

tends forwardly to a zone adjacentthe drivers seat of the tractor. VThe shaft 33 carries a lever 58 to which is connected a pull cord 59 also extending to the drivers seat of the tractor. As isV true for the shaft 32, a coil spring 60 surrounds the shaft 33, being secured tothe shaft in such a manner as to tend to 'normally revolve Vsaid shaft in one direction. If we assume that the parts Vare in theY position shown. nligure 1, and it Yis'de'sired to ,cause the bladeV to engage the earth torperform a digging operation, as for instance illustrated inFigure 2, the cord` 51 is'released to permit the loading lever 42 to move to When the lever 42-moves to the left of the showing of Figure 1 the shaft 32 is'revolved, which will rock the end levers 36 and 31, pulling the links 384V and 40 for-Y -;A wardly, VandV ther-upper forward ends of the said beams are rocked toward the members 24 and 25.

'Ihe blade'V V55 will engage'theearth to perform aV 20 Ydigging. operation .andas the.lever:58'fhas.not been actuated, the bowl itselfwill not revolvezrelati've Yto its Wheeled carriage.: Attention is called to the spaced stops carried by sides of the bowl'and VVthe fact that these stops Varenot released'ibyathe pins 5| of the :bell crank'levers resultant upon rocking the side beamsrelative tothe' draft frame,

Y see Figuresl and 2. After the blade-has scrapedY the desired amount of material. into the bowl, the bowl may be'revolvedV Vback from Y the? position shown in Figure 2to the position showningFigure V1, by pulling the-rope 51, the loadingl-lever'mov- Jing to the right of the showingof'FigurefZ. Y The Vtop portions of theside' beams and thedraft frame separate and the bowl again assumes the position shown in Figure 1 in full lines.- The'l load may then be Vdrawn to a given location'and upon pulling the rope 59, therduinp levervis-rocked'to in turn vrock the bell cranks and release-the `pins 5| from engagement with the stopsvon thebowl sides, for instance,from the stopsf53. .Whe'nthis occurs, the bowl will rotate to the position-shown Y in Figure 3, the bowl. being supported upon-'the Y shoes |2`fand' -i|3. This is termed ther-dumping position,'and further rotative'aotionfofthe bowl is preventedby the bell crankleversengaging 'the following stop 52. It is assumed, ofr course; that 'the operator merely pulls 'the rope' 59` and immediately releases the same, `so thatrthe bll'crank levers may properly engage the following stops, :if it is desired toengage said stops; If the bowl' assuines the' positionY shown inV Figure "3,V 1 the imaterialV beingA dumped mayfbegraded byfthe blade 55.`A VMovement of the Vpullv rope 59 to rock-"the lever 58f-will releaseY the stops 52 and thebowl will'make' a complete revolution torwh'ereV the bell 'crankswill'enga'ge'fthe first stops r54'an'd-'the'b'as'e r `lineposition therefor shownjin Figure `It will be noted-that crossframing is notjine cluded between the side beams, dueto thefact that the large bearings includedbetweentheside beams land the' trunnions suiici'ently support the side beams without wobble jor side movement. Hence, the bell crank levers andY particularly the pinsV 5| thereof 'will alwaysv properly engage the Y If'A any Xside rock occurred in the said beams, it is evident `,tlfilzt of the Vbowl plus its bladejwill assumethe dotted f the bellcrank levers might notengage lthejstops. However, the structure shown' permits "rigidity :without the necessity of transverseVV framingfv 'So far as the inventor knows, thisisla'new andim'- portant feature oflrthe present invention; *l

Reference now'made 13o-Figures 6` to18, in

elusive, which show' a scraperv ofthe drag type, ,75-

Ylevers 180 from the showing of Figure 2.

'lever shown in Figure 2.

lWhichis to say, it is not provided with a wheeled carriage. In all respects, with certain minor changes, the device here illustrated is the same as the device shown in Figures 1 'to 5, inclusive. In the present instance, however', I have changed the position of the levers 3S and 31. In other words, I have revolved the position of said rIherefore, like reference numerals will apply to the showing of Figures 6 to 8, with the exception of the levers just mentioned, whichV are .here designated as H38 and IGI. Viewing Figure 6, it will be seen that the lever Hill which is secured to the shaft 32 is substantially at right angles to the blade'55 of the drag scraper. In this position, it `will be noted that the lever Vl2 occupies the position corresponding to the position for the same However, the scraper blade vis paralleling the supporting surface over Whichvit is being moved. When this lever 42 is revolved to the position shown in Figure '7, which would correspond to the positions of Figures 1 or 3, it will be noted that the upper end poritions of the side beams are revolved toward the draft frame to cause the blade 55 to engage earth formation and result in a digging operation. Upon `releasing this lever to the position of Figure 6, Vthe parts are restored to a normal position so v'that the blade may parallel the ground` surface, -as shown in Figure 6. The operation of the lever 58 is the same as for the showing of Figures 1 to `5. Obviously, movement of the lever 58 from the Vposition of Figure 6 to that of Figure 8 will-release Vthe bell crank levers from the various catch elements to permit avrevolving of the bowl to either grade the formation received in the bowl, in the manner depicted in Figure 8, or to dump the bowl.

Itr will therefore be seen that the only difference between the two forms of the invention relates to the wheeled support and the position of the levers |00 iand 10|. In one case, the lever moves forward to cause a digging operation and in the second case, the lever moves backward to perform a digging operation.

The parts are capable of easy assemblage, as is self-evident from the most cursory inspection` of the drawings.

Attention is directed to the fact that movement of the lever 42 causes a locked relationship to exist between said lever 42 and the links 38 and 4E), through the medium of the levers |00 and IUI. Referring first to Figure '7 wherein the lever 62 has been moved to the right of the showing of Figure 6, it will be seen that the pivot point existing between the links 38 and 4E! with levers |90 and ll is such that the pivot points between the levers and the links is below the pivotal connections of the levers |05 and |01 with the shaft 32. Thus, the links 38 and 4G are locked and the scraper blade maintained in a digging position. This is .a feature of importance for both forms of the invention. In brief, the loading lever, which is the lever 42, locks the frame and the beam closed or open as the case may be.

It is obvious that various changes and modifications and variations may be made in practicing the invention in departure from the particular showing of the drawing without departing from the true spirit of the invention.

I claim:

1. In a device of the character disclosed, a pair of spaced side beams, a scraper rotatably mounted therebetween, a draft framing pivotally secured to the forward ends of said side beams, a countershaft pivotally secured to said draft framing, a

crank lever at eachend of the counter-shaft, links connecting said crank levers to said side beams at a point substantially between the ends thereof, means for actuating said counter-shaft to oscillate said crank levers causing movement of the side beams relative to said draft framing, thereby positioning said scraper. Y

2. In a device of the character disclosedya wheeled carriage, a scraper revolvably carried thereby, forwardly extending side beams at the Vsides of said scraper, a draft framing pivotally secured to the forward ends of said side beams, a transverse rock shaft on said draft framing,

levers for each end of said rock shaft, links conand lowering said scraper, said levers and links v being arranged to swing slightly past deadcenter for locking said side beams in the extreme raised position of said scraper.

3. In .a device of the character disclosed, a wheeled carriage, a scraper revolvably carried thereby, forwardly extending side beams pivotally interposed between the carriage wheels and the scraper, means for mounting said side beams to said carriage to prevent transverse movement of the-side beams relative to the carriage and the scraper, a draft frame, said frame pivotally secured to the forward ends of said side beams, a shaft carried by the draft frame, levers secured to said shaft, and links between said levers and saidside beams, means for actuating said shaft to cause movement of said side beams relative to said draft frame for controliing the positions of said scraper, said links and levers being arranged to swing past dead center for locking said side beams in the extreme inoperative or unloading positions of said scraper. 'Y

4; In a device of the character disclosed, a draft frame, a pair of spaced apart side members, pivotally connected at their forward ends to said draft frame, a scraping device revolvably carried between said side members, means associated with said side members and said scraping device for holding said scraping device in the operative or inoperative positions, toggle means associated with said draft frame and said side members for D controlling the operative and inoperative positions of said scraping device.

5. In a scraping device, the combination of a draft frame, a pair of spaced apart side members pivotally connected at the forward ends thereof to said draft frame, a scraper revolvably carried between said side members, means associated with said side members and said scraper for holding said scraper in the operative or inoperative positions, toggle means associated with said draft frame and said side members for controlling the loading and unloading positions of said scraper.

6. Control means in combination with a scraping device comprising a draft frame, a pair of spaced apart side members pivotally connected at the forward ends thereof to said draft frame, a scraper revolvably carried between said side members, means associated with said side members and said scraper for selectively limiting the rotation of said scraper, a transverse rock shaft carried on said draft frame, crank arms at the ends of said rock shaft, connecting links between said crank arms .and said side members, means for actuating said rock shaft to swing said side members relative to said draft frame thereby controlling the operative and inoperative positions of Y said scraper.

7. Control means for a scraping device comprising: a draft' frame, a pair of'spaced apart side members, pivotally connectedat the Vforward endsY thereof to said draft frame, arscraper rollably carried between said side members, means associatedV with Vsaid Yside Vmembers and said ,scraper for selectively limiting the'rotationV of said scraper, a transverse -rockshaft carried on said Y draft frame, crank arms at the ends of said rock shaft, links connecting said crank arms to said side members,V at a point substantially` midway of the length thereof, means for actuating said rock shaft to swing said side members relative to said draft frame thereby controlling the operative and Y inoperative positions Yof the scraper, said crank Y side members pivotally connected at their foraV arms Vand links being arranged to swing slightly past dead center for locking said side Vmembers in the extreme operating position. l Y

Y 8. Control means fora scraping device'com-V prising: a draft frame, a pair of s'pacedapart ward ends to said draft frame, a wheeled scraper revolvably carried Ybetween said side members, pmeansV associated with said side members and said scraper for selectively limiting the rotation of -said' scraper, a transverse rock shaftrcarried on said draft frame, crank arms at the ends of said rock shaft, links connecting said crank arms vto said side members, at a Vpoint substantially intermediate the ends thereof, means for actuat- Ving said rock shaft toV swing said side Vmembers relative to said draftY frame,'thereby controlling Ythe operative and inoperative positions of said scraper, said crank arms and links being ar-` ranged to swing slightly past dead center Vfor locking saidY side members in the extreme inoperative or unloading position. Y

9. Control means fora scraping device comprising: a draft frame having a pair of rear- Wardly extending and downwardly depending arms, a scraper bowl, a pair of'forwardly extending side members pivotally connected to said scraper-bowl, upper and lower corner portionsrat the forward ends of rsaid side memberapivotal meansV connecting the lower corner portions Yof said side members to the depending arms of said Y Y draft frame, a transverse rock shaft carried onV said draft frame, crank arms at the ends of said*V f Y rockshaft, links connecting said crank arms to said side members at arpoint intermediateV the,

ends thereof, means for actuating said rock shaft to vertically swing said sidemembers relative to said draft framegmeansV mounted on the upper corner portions of said side members and associatedwith said scraper bowlforrselectively limiting the rotation of said bowl,

10. Control means for a scraping device com- Y prising: a draft frame having a pair of rearwardly extending and downwardly depending arms, a wheeledscraper,bowl,l a pair of forwardly extending side members pivotally connectedY to said scraper bowl, upper and lower corner por-V tions at the forward ends of said side members, means mounted on the` upper corner portions of Vsaid side members and associated with said scraper bowl for selectively limiting the rotation- Vof said bowl, pivotal means connecting the lower ,cornerV portions of said side members to the de-Y pending arms of saidrdraft frame, a'rock shaft onV treme operating position, and means foractuat--VY ing said rock shaft to swing said` side members relative to said draft frame.

LEN o. BIRD. 

